Spherical positive-displacement rotary machine

Abstract

The proposed positive-displacement sphere-shaped rotor machine is intended for use as an engine, a pump or a compressor and comprises a casing consisting of two parts 1 and 2, in the spherical cavity of the casing three rotors 4, 5 and 6 being disposed, the central disk rotor 4 being connected from each side by means of a diametrical hinge with sector rotors 5 and 6. The rotors 4, 5 and 6 define four chambers 9, 10, 11 and 12. The chamber-forming radial surfaces of the rotors 4, 5 and 6 have a radius form. Inlet-outlet ducts 15, 16, 17 and 18 are disposed in the zone of overlapping by the sector rotors at the moment of changeover of the cycles in the chambers, the ducts having a nozzle portion and a tangential tilt. The diametrical hinge has two secured semi-axles 21 and 22, whose journals enter into spherical meniscus 25; the second diametrical hinge 5 has a non-split cylindrical axle. The half-casings 1 and 2 are provided with centering device 3 which makes it possible to vary the phase-setting angle and the precession of the machine. Cooling and lubrication of the rotor unit is effected through a network of ducts 26, 27, 28, 29 and 30 disposed therein. Between the parts 1 and 2 of the casing a gap is provided, which ensures the assembleability of the machine.

Description

FIELD OF THE ARTThe present invention relates to mechanical engineering, and more particularly to positive-displacement-action machines, and may be used as an engine, a pump, a compressor or a metering device.PRIOR ARTKnown in the art is a positive-displacement sphere-shaped rotor machine comprising a casing consisting of two interconnected parts, in a spherical cavity of the casing three rotors are disposed that define four chambers. A central rotor is connected from each side by means of a diametrical hinge to a sector rotor in the form of a ball sector, made integral with a shaft. The axes of rotation of the sector rotors are disposed at a certain angle to each other and intersect the axes of the diametrical hinges in the center of the spherical cavity. The axes of the diametrical hinges are perpendicular to each other. The rotors adjoin with their peripheral surfaces the spherical cavity of the machine casing in which four inlet-outlet ducts are disposed (JP No. 47-44565, PCT / SU...

AI Technical Summary

Benefits of technology

The above-described structural embodiment makes it possible to increase substantially the performance and service life of the machine.

Problems solved by technology

The known machine is disadvantageous in that the thickness of the sector rotor in the shaft region is small.

As a result, the shaft diameter and the size of main bearings are limited, the zone of total overlapping of the spherical cavity of the casing by the spherical surface of the rotor is insufficiently developed, and, as a consequence, the packing devices bordering the hot zone of the working chambers are complicated and ineffective.

Locating the inlet-outlet ducts near the bearing units mutually limits their effectiveness.

A relatively small thickness of the shafts and sector rotors makes the heat removal therefrom difficult, and this brings about their considerable calorific intensity.

The presence of a large dynamically unbalanced mass on the periphery of the central rotor leads to the origination of considerable internal stresses and deformations at high rotation speeds of the rotors.

The above-said disadvantages limit the performance and reliability of the machine.

This machine is disadvantageous in that the semi-axles of the diametrical hinges are disposed freely, whereby the speed of rotation of the rotors is limited because of high centrifugal loads of the freely disposed semi-axles acting on the sphere-forming surface of the machine.

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